/* ============================================================
   AiBersemi — Professional IT Portfolio
   Style Sheet
   ============================================================ */

/* ----- CSS Custom Properties / Design Tokens ----- */
:root {
    /* Colors — blue/cyan/indigo palette */
    --color-bg-primary: #0a0e17;
    --color-bg-secondary: #0f1524;
    --color-bg-card: rgba(15, 23, 42, 0.6);
    --color-bg-card-hover: rgba(20, 30, 55, 0.8);
    --color-bg-nav: rgba(10, 14, 23, 0.85);

    --color-accent: #38bdf8;
    --color-accent-dim: #0ea5e9;
    --color-accent-glow: rgba(56, 189, 248, 0.15);
    --color-accent-secondary: #818cf8;
    --color-accent-tertiary: #22d3ee;

    --color-text-primary: #e2e8f0;
    --color-text-secondary: #94a3b8;
    --color-text-muted: #64748b;
    --color-text-heading: #f1f5f9;

    --color-border: rgba(56, 189, 248, 0.1);
    --color-border-hover: rgba(56, 189, 248, 0.3);
    --color-border-card: rgba(100, 116, 139, 0.15);

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #38bdf8 0%, #818cf8 50%, #c084fc 100%);
    --gradient-bg: radial-gradient(ellipse at 20% 50%, rgba(56, 189, 248, 0.08) 0%, transparent 50%),
                    radial-gradient(ellipse at 80% 20%, rgba(129, 140, 248, 0.06) 0%, transparent 50%),
                    radial-gradient(ellipse at 50% 80%, rgba(34, 211, 238, 0.04) 0%, transparent 50%);
    --gradient-card: linear-gradient(135deg, rgba(56, 189, 248, 0.05) 0%, rgba(129, 140, 248, 0.03) 100%);

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;

    /* Spacing */
    --container-max: 1200px;
    --section-padding: 6rem 0;
    --gap-sm: 0.75rem;
    --gap-md: 1.5rem;
    --gap-lg: 3rem;
    --gap-xl: 4.5rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 50%;

    /* Transitions */
    --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
    --transition-fast: 0.2s var(--ease-out);
    --transition-normal: 0.4s var(--ease-out);
    --transition-slow: 0.6s var(--ease-out);

    /* Z-index layers */
    --z-canvas: -1;
    --z-content: 1;
    --z-header: 100;
    --z-preloader: 1000;
}


/* ----- Reset & Base ----- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-primary);
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text-primary);
    background-color: var(--color-bg-primary);
    overflow-x: hidden;
    position: relative;
}

body::before {
    content: '';
    position: fixed;
    inset: 0;
    background: var(--gradient-bg);
    pointer-events: none;
    z-index: var(--z-canvas);
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

a {
    color: var(--color-accent);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-accent-tertiary);
}

a:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 3px;
    border-radius: 4px;
}

::selection {
    background: rgba(56, 189, 248, 0.3);
    color: #fff;
}


/* ----- Container ----- */
.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 1.5rem;
}


/* ----- Preloader ----- */
.preloader {
    position: fixed;
    inset: 0;
    background: var(--color-bg-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: var(--z-preloader);
    transition: opacity 0.5s ease, visibility 0.5s ease;
}

.preloader.hidden {
    opacity: 0;
    visibility: hidden;
}

.preloader-content {
    text-align: center;
}

.preloader-ring {
    width: 56px;
    height: 56px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-accent);
    border-radius: var(--radius-full);
    animation: spin 0.9s linear infinite;
    margin: 0 auto 1.25rem;
}

.preloader-text {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    color: var(--color-accent);
    letter-spacing: 2px;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}


/* ----- Particle Canvas ----- */
#particle-canvas {
    position: fixed;
    inset: 0;
    width: 100%;
    height: 100%;
    z-index: var(--z-canvas);
    pointer-events: none;
}


/* ----- Header / Navigation ----- */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-header);
    background: var(--color-bg-nav);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    transition: transform var(--transition-normal), box-shadow var(--transition-normal);
}

.header.scrolled {
    box-shadow: 0 4px 30px rgba(0, 0, 0, 0.3);
}

.nav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 70px;
}

.nav-logo {
    font-family: var(--font-mono);
    font-size: 1.35rem;
    font-weight: 700;
    color: var(--color-text-heading);
    letter-spacing: -0.5px;
    transition: color var(--transition-fast);
}

.nav-logo:hover {
    color: var(--color-accent);
}

.logo-bracket {
    color: var(--color-accent);
    font-weight: 400;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 0.25rem;
    list-style: none;
}

.nav-link {
    display: inline-flex;
    align-items: center;
    padding: 0.5rem 1rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    border-radius: var(--radius-sm);
    transition: color var(--transition-fast), background var(--transition-fast);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 4px;
    left: 50%;
    transform: translateX(-50%) scaleX(0);
    width: 20px;
    height: 2px;
    background: var(--color-accent);
    border-radius: 1px;
    transition: transform var(--transition-fast);
}

.nav-link:hover,
.nav-link.active {
    color: var(--color-text-heading);
}

.nav-link.active::after,
.nav-link:hover::after {
    transform: translateX(-50%) scaleX(1);
}

/* Hamburger / Mobile Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 6px;
    background: none;
    border: none;
    cursor: pointer;
    z-index: 110;
}

.hamburger-line {
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    border-radius: 2px;
    transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.nav-toggle.active .hamburger-line:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.nav-toggle.active .hamburger-line:nth-child(2) {
    opacity: 0;
}
.nav-toggle.active .hamburger-line:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}


/* ----- Hero Section ----- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 7rem 0 4rem;
    overflow: hidden;
}

.hero-bg-glow {
    position: absolute;
    top: 20%;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(56, 189, 248, 0.12) 0%, transparent 70%);
    border-radius: var(--radius-full);
    filter: blur(80px);
    pointer-events: none;
    animation: glowPulse 6s ease-in-out infinite alternate;
}

@keyframes glowPulse {
    0% { opacity: 0.6; transform: translateX(-50%) scale(0.95); }
    100% { opacity: 1; transform: translateX(-50%) scale(1.05); }
}

.hero-container {
    position: relative;
    z-index: var(--z-content);
}

/* Avatar */
.hero-avatar-wrapper {
    position: relative;
    width: 180px;
    height: 180px;
    margin: 0 auto 2.5rem;
    animation: floatAvatar 6s ease-in-out infinite;
}

@keyframes floatAvatar {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-12px); }
}

.avatar-ring {
    position: absolute;
    inset: -8px;
    border-radius: var(--radius-full);
    background: var(--gradient-primary);
    opacity: 0.5;
    animation: ringRotate 8s linear infinite;
}

@keyframes ringRotate {
    0% { filter: hue-rotate(0deg); }
    100% { filter: hue-rotate(360deg); }
}

.hero-avatar {
    width: 180px;
    height: 180px;
    border-radius: var(--radius-full);
    object-fit: cover;
    position: relative;
    z-index: 2;
    border: 4px solid var(--color-bg-primary);
    box-shadow: 0 0 40px rgba(56, 189, 248, 0.2);
}

/* Hero Text */
.hero-title {
    font-size: clamp(2.5rem, 6vw, 4.5rem);
    font-weight: 900;
    letter-spacing: -2px;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 1rem;
    opacity: 0;
    animation: fadeSlideUp 0.8s var(--ease-out) 0.3s forwards;
}

.hero-subtitle {
    font-family: var(--font-mono);
    font-size: clamp(0.95rem, 2vw, 1.2rem);
    color: var(--color-accent);
    margin-bottom: 1.5rem;
    min-height: 1.8em;
    opacity: 0;
    animation: fadeSlideUp 0.8s var(--ease-out) 0.5s forwards;
}

.typed-cursor {
    font-weight: 300;
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

.hero-description {
    max-width: 600px;
    margin: 0 auto 2.5rem;
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    opacity: 0;
    animation: fadeSlideUp 0.8s var(--ease-out) 0.7s forwards;
}

/* CTA Buttons */
.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--gap-sm);
    justify-content: center;
    opacity: 0;
    animation: fadeSlideUp 0.8s var(--ease-out) 0.9s forwards;
}

@keyframes fadeSlideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Scroll Indicator */
.hero-scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    opacity: 0;
    animation: fadeIn 1s var(--ease-out) 1.5s forwards;
}

@keyframes fadeIn {
    to { opacity: 0.6; }
}

.scroll-mouse {
    width: 26px;
    height: 40px;
    border: 2px solid var(--color-text-muted);
    border-radius: 13px;
    display: flex;
    justify-content: center;
    padding-top: 8px;
}

.scroll-wheel {
    width: 3px;
    height: 8px;
    background: var(--color-accent);
    border-radius: 2px;
    animation: scrollWheel 2s ease-in-out infinite;
}

@keyframes scrollWheel {
    0% { opacity: 1; transform: translateY(0); }
    100% { opacity: 0; transform: translateY(12px); }
}

.scroll-text {
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 2px;
    color: var(--color-text-muted);
}


/* ----- Buttons ----- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-family: var(--font-primary);
    font-size: 0.9rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition-fast);
    white-space: nowrap;
    text-decoration: none;
}

.btn-icon {
    flex-shrink: 0;
}

.btn-primary {
    background: var(--gradient-primary);
    color: #0a0e17;
    border-color: transparent;
    box-shadow: 0 4px 20px rgba(56, 189, 248, 0.25);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(56, 189, 248, 0.35);
    color: #0a0e17;
}

.btn-secondary {
    background: rgba(56, 189, 248, 0.1);
    color: var(--color-accent);
    border-color: var(--color-border-hover);
}
.btn-secondary:hover {
    background: rgba(56, 189, 248, 0.2);
    transform: translateY(-2px);
    color: var(--color-accent);
}

.btn-outline {
    background: transparent;
    color: var(--color-text-primary);
    border-color: var(--color-border-card);
}
.btn-outline:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    transform: translateY(-2px);
}

.btn-ghost {
    background: transparent;
    color: var(--color-text-secondary);
    border-color: transparent;
}
.btn-ghost:hover {
    color: var(--color-accent);
}


/* ----- Section Styles ----- */
.section {
    padding: var(--section-padding);
    position: relative;
}

.section-alt {
    background: var(--color-bg-secondary);
}

.section-header {
    text-align: center;
    margin-bottom: var(--gap-xl);
}

.section-tag {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-accent);
    letter-spacing: 1px;
    display: block;
    margin-bottom: 0.75rem;
}

.section-title {
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 800;
    color: var(--color-text-heading);
    letter-spacing: -1px;
    margin-bottom: 1rem;
}

.section-divider {
    width: 60px;
    height: 3px;
    background: var(--gradient-primary);
    margin: 0 auto;
    border-radius: 2px;
}

.section-subtitle {
    max-width: 560px;
    margin: 1.25rem auto 0;
    color: var(--color-text-secondary);
    font-size: 1rem;
}

.section-cta {
    text-align: center;
    margin-top: var(--gap-lg);
}


/* ----- About Section ----- */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--gap-xl);
    align-items: start;
}

.about-text {
    color: var(--color-text-secondary);
    margin-bottom: 1.25rem;
    font-size: 1rem;
    line-height: 1.85;
}

.about-highlights {
    margin-top: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.highlight-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem 1.25rem;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-card);
    border-radius: var(--radius-md);
    transition: border-color var(--transition-fast), transform var(--transition-fast);
}

.highlight-item:hover {
    border-color: var(--color-border-hover);
    transform: translateX(4px);
}

.highlight-icon {
    font-size: 1.4rem;
    flex-shrink: 0;
    margin-top: 2px;
}

.highlight-item strong {
    display: block;
    color: var(--color-text-heading);
    font-size: 0.95rem;
    margin-bottom: 0.2rem;
}

.highlight-item p {
    color: var(--color-text-muted);
    font-size: 0.85rem;
    line-height: 1.5;
}

/* Code Window */
.about-card-visual {
    position: sticky;
    top: 100px;
}

.code-window {
    background: rgba(10, 14, 23, 0.9);
    border: 1px solid var(--color-border-card);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.code-window-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 0.85rem 1rem;
    background: rgba(15, 21, 36, 0.8);
    border-bottom: 1px solid var(--color-border-card);
}

.code-dot {
    width: 12px;
    height: 12px;
    border-radius: var(--radius-full);
}
.code-dot.red { background: #ef4444; }
.code-dot.yellow { background: #eab308; }
.code-dot.green { background: #22c55e; }

.code-window-title {
    margin-left: auto;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.code-window-body {
    padding: 1.5rem;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.8;
    color: var(--color-text-secondary);
    overflow-x: auto;
}

.json-key { color: #818cf8; }
.json-str { color: #34d399; }
.json-bool { color: #f59e0b; }


/* ----- Skills Section ----- */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: 1rem;
}

.skill-card {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-card);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
    cursor: default;
}

.skill-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-3px);
    box-shadow: 0 8px 25px rgba(56, 189, 248, 0.08);
    background: var(--color-bg-card-hover);
}

.skill-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
    width: 36px;
    text-align: center;
}

.skill-name {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--color-text-heading);
}


/* ----- Projects Section ----- */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: var(--gap-md);
}

.project-card {
    position: relative;
    padding: 2rem;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-card);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    overflow: hidden;
    text-decoration: none;
    display: block;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
    transform-origin: left;
}

.project-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-6px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.project-card:hover::before {
    transform: scaleX(1);
}

.project-card-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.project-card-icon {
    color: var(--color-accent);
    flex-shrink: 0;
}

.project-card-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-text-heading);
}

.project-card-desc {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: 1.25rem;
}

.project-card-meta {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.project-meta-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.3rem 0.75rem;
    background: rgba(56, 189, 248, 0.08);
    color: var(--color-accent);
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 500;
}

.meta-dot {
    width: 8px;
    height: 8px;
    border-radius: var(--radius-full);
    flex-shrink: 0;
}

.project-card-link {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
    margin-left: auto;
}

.project-card:hover .project-card-link {
    color: var(--color-accent);
}


/* ----- Extensions Section ----- */
.extensions-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: var(--gap-md);
}

.extension-card {
    position: relative;
    padding: 2rem;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-card);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    overflow: hidden;
    text-decoration: none;
    display: block;
}

.extension-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(135deg, #c084fc 0%, #818cf8 50%, #38bdf8 100%);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
    transform-origin: left;
}

.extension-card:hover {
    border-color: rgba(129, 140, 248, 0.3);
    transform: translateY(-6px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.extension-card:hover::before {
    transform: scaleX(1);
}

.extension-card-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.extension-card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, rgba(129, 140, 248, 0.15), rgba(56, 189, 248, 0.1));
    color: var(--color-accent-secondary);
    flex-shrink: 0;
}

.extension-card-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-text-heading);
}

.extension-card-publisher {
    font-size: 0.8rem;
    color: var(--color-text-muted);
    margin-top: 2px;
}

.extension-card-desc {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
    margin-bottom: 1.25rem;
}

.extension-card-footer {
    display: flex;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.extension-version {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.3rem 0.75rem;
    background: rgba(129, 140, 248, 0.08);
    color: var(--color-accent-secondary);
    border-radius: 20px;
    font-size: 0.78rem;
    font-weight: 500;
    font-family: var(--font-mono);
}

.extension-card-link {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    transition: color var(--transition-fast);
    margin-left: auto;
}

.extension-card:hover .extension-card-link {
    color: var(--color-accent-secondary);
}


/* ----- Services Section ----- */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: var(--gap-md);
}

.service-card {
    padding: 2rem;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-card);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
    cursor: default;
    position: relative;
    overflow: hidden;
}

.service-card::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--transition-normal);
    transform-origin: center;
}

.service-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-4px);
    box-shadow: 0 12px 30px rgba(0, 0, 0, 0.15);
}

.service-card:hover::after {
    transform: scaleX(1);
}

.service-icon {
    font-size: 2rem;
    margin-bottom: 1.25rem;
    display: block;
}

.service-title {
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--color-text-heading);
    margin-bottom: 0.75rem;
}

.service-desc {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    line-height: 1.7;
}


/* ----- Professional Highlights Section ----- */
.highlights-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--gap-md);
}

.highlight-card {
    display: flex;
    align-items: flex-start;
    gap: 1.25rem;
    padding: 1.75rem;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-card);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.highlight-card:hover {
    border-color: var(--color-border-hover);
    transform: translateX(4px);
}

.highlight-card-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent-glow);
    color: var(--color-accent);
    flex-shrink: 0;
    font-size: 1.2rem;
}

.highlight-card-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--color-text-heading);
    margin-bottom: 0.4rem;
}

.highlight-card-desc {
    color: var(--color-text-muted);
    font-size: 0.85rem;
    line-height: 1.6;
}


/* ----- Contact Section ----- */
.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: var(--gap-md);
}

.contact-card {
    padding: 2rem;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border-card);
    border-radius: var(--radius-md);
    text-align: center;
    transition: all var(--transition-normal);
    display: block;
    text-decoration: none;
}

.contact-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-6px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.2);
}

.contact-card-placeholder {
    cursor: default;
    opacity: 0.7;
}
.contact-card-placeholder:hover {
    transform: none;
    box-shadow: none;
    border-color: var(--color-border-card);
}

.contact-icon {
    width: 64px;
    height: 64px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-accent-glow);
    color: var(--color-accent);
    margin: 0 auto 1.25rem;
    transition: background var(--transition-fast);
}

.contact-card:hover .contact-icon {
    background: rgba(56, 189, 248, 0.25);
}

.contact-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--color-text-heading);
    margin-bottom: 0.5rem;
}

.contact-desc {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.contact-link-text {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-accent);
}


/* ----- Footer ----- */
.footer {
    padding: 3rem 0;
    border-top: 1px solid var(--color-border);
    background: rgba(10, 14, 23, 0.6);
}

.footer-content {
    text-align: center;
}

.footer-logo {
    font-family: var(--font-mono);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-text-heading);
    margin-bottom: 0.75rem;
}

.footer-text {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.footer-links {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.footer-link {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

.footer-link:hover {
    color: var(--color-accent);
}

.footer-separator {
    color: var(--color-text-muted);
}

.footer-copy {
    color: var(--color-text-muted);
    font-size: 0.8rem;
}


/* ----- Reveal Animation ----- */
.reveal {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s var(--ease-out), transform 0.8s var(--ease-out);
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}


/* ----- Responsive Design ----- */

/* Tablet (≤ 1024px) */
@media (max-width: 1024px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: var(--gap-lg);
    }

    .about-card-visual {
        position: static;
    }

    .projects-grid,
    .extensions-grid {
        grid-template-columns: 1fr;
    }
}

/* Mobile (≤ 768px) */
@media (max-width: 768px) {
    :root {
        --section-padding: 4rem 0;
    }

    /* Mobile Navigation */
    .nav-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        flex-direction: column;
        background: var(--color-bg-secondary);
        border-left: 1px solid var(--color-border);
        padding: 5rem 2rem 2rem;
        gap: 0.5rem;
        transition: right var(--transition-normal);
        z-index: 105;
    }

    .nav-menu.open {
        right: 0;
    }

    .nav-link {
        width: 100%;
        padding: 0.75rem 1rem;
        font-size: 1rem;
    }

    .nav-link::after {
        left: 0;
        transform: scaleX(0);
        transform-origin: left;
        bottom: auto;
        top: 50%;
        margin-top: -1px;
        width: 3px;
        height: 20px;
    }

    .nav-link.active::after,
    .nav-link:hover::after {
        transform: scaleX(1);
    }

    /* Mobile hero */
    .hero {
        padding: 6rem 0 3rem;
    }

    .hero-avatar-wrapper {
        width: 140px;
        height: 140px;
        margin-bottom: 2rem;
    }

    .avatar-ring {
        inset: -6px;
    }

    .hero-avatar {
        width: 140px;
        height: 140px;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }

    .hero-scroll-indicator {
        display: none;
    }

    /* Grids */
    .skills-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .services-grid {
        grid-template-columns: 1fr;
    }

    .highlights-grid {
        grid-template-columns: 1fr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }
}

/* Small Mobile (≤ 480px) */
@media (max-width: 480px) {
    .skills-grid {
        grid-template-columns: 1fr;
    }

    .section-title {
        font-size: 1.6rem;
    }
}